@indice/ng-components
Version:
Indice common components for Angular v12
188 lines • 25.6 kB
JavaScript
import { ElementRef, TemplateRef, Injector, } from '@angular/core';
import { Subject } from 'rxjs';
import { ContentRef } from './content-ref.class';
/**
* Provides ways of loading and handling dynamic content.
*
* @remarks
* Do NOT use this directly, create an instance through {@link ComponentLoaderFactory}
* You can use this loader in two ways:
* - Attaches a component to `ViewContainerRef`.
* - Attaches a component to `ViewContainerRef`. The attached component has a `<ng-content>` tag inside its view. The {@link ComponentLoaderOptions.content} will be drawn inside this tag.
*
* @internal
*/
export class ComponentLoader {
constructor(vcr, cfr, applicationRef, injector) {
this.vcr = vcr;
this.cfr = cfr;
this.applicationRef = applicationRef;
this.injector = injector;
/**
* Before content is shown event.
*/
this.onBeforeShow = new Subject();
/**
* After show content event.
* @returns The id of newly created component ref.
*/
this.onShown = new Subject();
/**
* Before content is hidden event.
* @returns The instance of attached component;
*/
this.onBeforeHide = new Subject();
/**
* After content is hidden event.
* @returns The id of destroyed component ref.
*/
this.onHidden = new Subject();
this.providers = [];
this.containerDefaultSelector = 'body';
}
/**
* Attaches component.
* @param componentType - The type component to attach.
* @returns Current instance of {@link ComponentLoader}
*/
attach(componentType) {
this.componentFactory = this.cfr.resolveComponentFactory(componentType);
return this;
}
/**
* Body will be used in nothing is provided.
* @param container - The element in which dynamic content will be drawn inside to. For string case a query to the dom will be executed to find the element.
* @returns Current instance of {@link ComponentLoader}
*/
to(container) {
this.container = container || this.container;
return this;
}
/**
* Adds provider to the providers array. These providers will be injected to the attached component.
*
* @see {@link https://angular.io/guide/glossary#di-token | Injection Token}
*
* @param provider - Provider to inject.
* @returns Current instance of {@link ComponentLoader}
*/
provide(provider) {
this.providers.push(provider);
return this;
}
/**
* Attaches attached component to dom and any dynamic content if provided.
* @remarks
* Also triggers the {@link ComponentLoader.onBeforeShow} and {@link ComponentLoader.onShown} events.
*
* @param options - {@link ComponentLoaderOptions}.
* @returns A reference to the created content.
*/
show(options = {}) {
if (this.componentRef) {
throw Error('Component is already shown');
}
if (!this.componentFactory) {
throw Error('You must attach a component');
}
this.onBeforeShow.next({});
if (options.content) {
this.contentRef = this.getContentRef(options.content, options.context, options.initialState);
}
this.createComponentAndAttachToView(options);
this.appendContentToContainer();
this.markComponentsForCheck();
this.onShown.next(options.id);
return this.componentRef;
}
/**
* Removes attached component from dom.
* @remarks
* Also triggers the {@link ComponentLoader.onBeforeHide} and {@link ComponentLoader.onHidden} events.
*
* @param id - If provided it is returned through the {@link ComponentLoader.onHidden}.
* @returns Current instance of {@link ComponentLoader}
*/
hide(id, result) {
if (!this.componentRef) {
throw Error('No attached component found to hide');
}
this.onBeforeHide.next(this.componentRef.instance);
const componentEl = this.componentRef.location.nativeElement;
componentEl.parentNode.removeChild(componentEl);
if (this.contentRef?.componentRef) {
this.contentRef.componentRef.destroy();
}
if (this.vcr && this.contentRef?.viewRef) {
this.vcr.remove(this.vcr.indexOf(this.contentRef.viewRef));
}
if (this.contentRef?.viewRef) {
this.contentRef.viewRef.destroy();
}
this.contentRef = void 0;
this.componentRef = void 0;
this.onHidden.next(id ? { id, result } : null);
return this;
}
getInnerComponent() {
return this.innerComponent;
}
markComponentsForCheck() {
if (this.contentRef?.componentRef) {
this.innerComponent = this.contentRef.componentRef.instance;
this.contentRef.componentRef.changeDetectorRef.markForCheck();
this.contentRef.componentRef.changeDetectorRef.detectChanges();
}
this.componentRef.changeDetectorRef.markForCheck();
this.componentRef.changeDetectorRef.detectChanges();
}
createComponentAndAttachToView(options) {
const injector = Injector.create({
providers: this.providers,
parent: this.injector,
});
this.componentRef = this.componentFactory.create(injector, this.contentRef?.nodes);
this.applicationRef.attachView(this.componentRef.hostView);
this.instance = this.componentRef.instance;
Object.assign(this.componentRef.instance, options);
}
appendContentToContainer() {
if (this.container instanceof ElementRef) {
this.container.nativeElement.appendChild(this.componentRef?.location.nativeElement);
}
if (typeof this.container === 'string' && typeof document !== 'undefined') {
const selectedElement = document.querySelector(this.container) || document.querySelector(this.containerDefaultSelector);
if (!selectedElement) {
return;
}
selectedElement.appendChild(this.componentRef?.location.nativeElement);
}
}
getContentRef(content, context, initialState) {
//TemplateRef case
if (content instanceof TemplateRef) {
if (this.vcr) {
const viewRef = this.vcr.createEmbeddedView(content, context);
viewRef.markForCheck();
return new ContentRef([viewRef.rootNodes], viewRef);
}
const viewRef = content.createEmbeddedView({});
this.applicationRef.attachView(viewRef);
return new ContentRef([viewRef.rootNodes], viewRef);
}
//Component case
if (typeof content === 'function') {
const contentCf = this.cfr.resolveComponentFactory(content);
const injector = Injector.create({
providers: this.providers,
parent: this.injector,
});
const componentRef = contentCf.create(injector);
// Object.assign(componentRef.instance, initialState);
this.applicationRef.attachView(componentRef.hostView);
return new ContentRef([[componentRef.location.nativeElement]], componentRef.hostView, componentRef);
}
throw Error('Unsupported content type');
}
}
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{\r\n  ComponentFactoryResolver,\r\n  ViewContainerRef,\r\n  ComponentFactory,\r\n  Type,\r\n  ElementRef,\r\n  StaticProvider,\r\n  TemplateRef,\r\n  ComponentRef,\r\n  ApplicationRef,\r\n  Injector,\r\n} from '@angular/core';\r\nimport { Subject } from 'rxjs';\r\nimport { ComponentLoaderOptions } from './component-loader-options.class';\r\nimport { ContentRef } from './content-ref.class';\r\n\r\n/**\r\n * Provides ways of loading and handling dynamic content.\r\n *\r\n * @remarks\r\n * Do NOT use this directly, create an instance through {@link ComponentLoaderFactory}\r\n * You can use this loader in two ways:\r\n * - Attaches a component to `ViewContainerRef`.\r\n * - Attaches a component to `ViewContainerRef`. The attached component has a `<ng-content>` tag inside its view. The {@link ComponentLoaderOptions.content} will be drawn inside this tag.\r\n *\r\n * @internal\r\n */\r\nexport class ComponentLoader<T extends object> {\r\n  /**\r\n   * Before content is shown event.\r\n   */\r\n  onBeforeShow = new Subject();\r\n  /**\r\n   * After show content event.\r\n   * @returns The id of newly created component ref.\r\n   */\r\n  onShown = new Subject();\r\n  /**\r\n   * Before content is hidden event.\r\n   * @returns The instance of attached component;\r\n   */\r\n  onBeforeHide = new Subject();\r\n  /**\r\n   * After content is hidden event.\r\n   * @returns The id of destroyed component ref.\r\n   */\r\n  onHidden = new Subject();\r\n\r\n  public instance?: T;\r\n  public componentRef?: ComponentRef<T>;\r\n  private componentFactory?: ComponentFactory<T>;\r\n  private container: string | ElementRef | any;\r\n  private providers: StaticProvider[] = [];\r\n  private contentRef?: ContentRef;\r\n  private containerDefaultSelector = 'body';\r\n  private innerComponent?: ComponentRef<T>;\r\n  constructor(\r\n    private vcr: ViewContainerRef | undefined,\r\n    private cfr: ComponentFactoryResolver,\r\n    private applicationRef: ApplicationRef,\r\n    private injector: Injector\r\n  ) {}\r\n\r\n  /**\r\n   * Attaches component.\r\n   * @param componentType - The type component to attach.\r\n   * @returns Current instance of {@link ComponentLoader}\r\n   */\r\n  public attach(componentType: Type<T>): ComponentLoader<T> {\r\n    this.componentFactory = this.cfr.resolveComponentFactory<T>(componentType);\r\n    return this;\r\n  }\r\n\r\n  /**\r\n   * Body will be used in nothing is provided.\r\n   * @param container - The element in which dynamic content will be drawn inside to. For string case a query to the dom will be executed to find the element.\r\n   * @returns Current instance of {@link ComponentLoader}\r\n   */\r\n  public to(container?: string | ElementRef): ComponentLoader<T> {\r\n    this.container = container || this.container;\r\n    return this;\r\n  }\r\n\r\n  /**\r\n   * Adds provider to the providers array. These providers will be injected to the attached component.\r\n   *\r\n   * @see {@link https://angular.io/guide/glossary#di-token | Injection Token}\r\n   *\r\n   * @param provider - Provider to inject.\r\n   * @returns Current instance of {@link ComponentLoader}\r\n   */\r\n  public provide(provider: StaticProvider): ComponentLoader<T> {\r\n    this.providers.push(provider);\r\n    return this;\r\n  }\r\n\r\n  /**\r\n   * Attaches attached component to dom and any dynamic content if provided.\r\n   * @remarks\r\n   * Also triggers the {@link ComponentLoader.onBeforeShow} and {@link ComponentLoader.onShown} events.\r\n   *\r\n   * @param options - {@link ComponentLoaderOptions}.\r\n   * @returns A reference to the created content.\r\n   */\r\n  public show(options: ComponentLoaderOptions = {}): ComponentRef<T> | undefined {\r\n    if (this.componentRef) {\r\n      throw Error('Component is already shown');\r\n    }\r\n    if (!this.componentFactory) {\r\n      throw Error('You must attach a component');\r\n    }\r\n    this.onBeforeShow.next({});\r\n\r\n    if (options.content) {\r\n      this.contentRef = this.getContentRef(options.content, options.context, options.initialState);\r\n    }\r\n    this.createComponentAndAttachToView(options);\r\n    this.appendContentToContainer();\r\n    this.markComponentsForCheck();\r\n\r\n    this.onShown.next(options.id);\r\n\r\n    return this.componentRef;\r\n  }\r\n\r\n  /**\r\n   * Removes attached component from dom.\r\n   * @remarks\r\n   * Also triggers the {@link ComponentLoader.onBeforeHide} and {@link ComponentLoader.onHidden} events.\r\n   *\r\n   * @param id - If provided it is returned through the {@link ComponentLoader.onHidden}.\r\n   * @returns Current instance of {@link ComponentLoader}\r\n   */\r\n  public hide(id?: number | string, result?: any): ComponentLoader<T> {\r\n    if (!this.componentRef) {\r\n      throw Error('No attached component found to hide');\r\n    }\r\n\r\n    this.onBeforeHide.next(this.componentRef.instance);\r\n\r\n    const componentEl = this.componentRef.location.nativeElement;\r\n    componentEl.parentNode.removeChild(componentEl);\r\n    if (this.contentRef?.componentRef) {\r\n      this.contentRef.componentRef.destroy();\r\n    }\r\n    if (this.vcr && this.contentRef?.viewRef) {\r\n      this.vcr.remove(this.vcr.indexOf(this.contentRef.viewRef));\r\n    }\r\n    if (this.contentRef?.viewRef) {\r\n      this.contentRef.viewRef.destroy();\r\n    }\r\n    this.contentRef = void 0;\r\n    this.componentRef = void 0;\r\n\r\n    this.onHidden.next(id ? { id, result } : null);\r\n\r\n    return this;\r\n  }\r\n\r\n  getInnerComponent(): ComponentRef<T> | undefined {\r\n    return this.innerComponent;\r\n  }\r\n\r\n  private markComponentsForCheck() {\r\n    if (this.contentRef?.componentRef) {\r\n      this.innerComponent = this.contentRef.componentRef.instance;\r\n      this.contentRef.componentRef.changeDetectorRef.markForCheck();\r\n      this.contentRef.componentRef.changeDetectorRef.detectChanges();\r\n    }\r\n    this.componentRef!.changeDetectorRef.markForCheck();\r\n    this.componentRef!.changeDetectorRef.detectChanges();\r\n  }\r\n\r\n  private createComponentAndAttachToView(options: ComponentLoaderOptions) {\r\n    const injector = Injector.create({\r\n      providers: this.providers,\r\n      parent: this.injector,\r\n    });\r\n    this.componentRef = this.componentFactory!.create(injector, this.contentRef?.nodes);\r\n    this.applicationRef.attachView(this.componentRef.hostView);\r\n    this.instance = this.componentRef.instance;\r\n    Object.assign(this.componentRef.instance, options);\r\n  }\r\n\r\n  private appendContentToContainer() {\r\n    if (this.container instanceof ElementRef) {\r\n      this.container.nativeElement.appendChild(this.componentRef?.location.nativeElement);\r\n    }\r\n    if (typeof this.container === 'string' && typeof document !== 'undefined') {\r\n      const selectedElement = document.querySelector(this.container) || document.querySelector(this.containerDefaultSelector);\r\n      if (!selectedElement) {\r\n        return;\r\n      }\r\n      selectedElement.appendChild(this.componentRef?.location.nativeElement);\r\n    }\r\n  }\r\n\r\n  private getContentRef(content?: string | TemplateRef<any>, context?: any, initialState?: any): ContentRef {\r\n    //TemplateRef case\r\n    if (content instanceof TemplateRef) {\r\n      if (this.vcr) {\r\n        const viewRef = this.vcr.createEmbeddedView<TemplateRef<T>>(content, context);\r\n        viewRef.markForCheck();\r\n        return new ContentRef([viewRef.rootNodes], viewRef);\r\n      }\r\n      const viewRef = content.createEmbeddedView({});\r\n      this.applicationRef.attachView(viewRef);\r\n      return new ContentRef([viewRef.rootNodes], viewRef);\r\n    }\r\n\r\n    //Component case\r\n    if (typeof content === 'function') {\r\n      const contentCf = this.cfr.resolveComponentFactory(content);\r\n      const injector = Injector.create({\r\n        providers: this.providers,\r\n        parent: this.injector,\r\n      });\r\n      const componentRef = contentCf.create(injector);\r\n      // Object.assign(componentRef.instance, initialState);\r\n      this.applicationRef.attachView(componentRef.hostView);\r\n      return new ContentRef([[componentRef.location.nativeElement]], componentRef.hostView, componentRef);\r\n    }\r\n\r\n    throw Error('Unsupported content type');\r\n  }\r\n}\r\n"]}